$^{9}\mathrm{Be}(p,α)^{6}\mathrm{Li}$ 反应天体物理 $S(E)$ 因子的多模型分析及其对天体物理反应率的影响
Multi-Model Analysis of the Astrophysical $S(E)$ Factor for the $^{9}\mathrm{Be}(p,α)^{6}\mathrm{Li}$ Reaction and Its Impact on Astrophysical Reaction Rates
浏览论文内容
中文总结 AI 辅助
本文通过多项式拟合、双 Breit–Wigner 模型和 R-矩阵形式系统分析 $^{9}\mathrm{Be}(p,α)^{6}\mathrm{Li}$ 反应的 THM 数据，比较各模型适用性，为恒星反应率计算提供更可靠基础。
中文摘要 AI 辅助
$^{9}\mathrm{Be}(p,α)^{6}\mathrm{Li}$ 反应是恒星及大爆炸中 $^{9}\text{Be}$ 的销毁过程。特洛伊木马方法（THM）是一种成熟的间接技术，能够在伽莫夫能量区域内确定反应截面，同时避免与 $S(E)$ 因子低能外推及电子屏蔽效应相关的不确定性。在本工作中，Wen 等人报告的裸核 THM 数据被系统地使用多项式拟合、双 Breit–Wigner 模型和 $R$-矩阵形式进行分析。研究了这些理论方法在描述 $^{9}\mathrm{Be}(p,α)^{6}\mathrm{Li}$ 反应低能 $S(E)$ 因子方面的适用性和物理意义，并进行了比较。由于 THM 数据已被纳入 NACRE II 反应率汇编，从而提高了反应率评估的精度，本文提出的精细理论分析进一步揭示了下层反应动力学，并为恒星反应率计算建立了更可靠的基础。本工作获得的结果为未来核天体物理学中的高精度实验研究和理论模型发展提供了有价值的参考。
英文摘要
The $^{9}\mathrm{Be}(p,α)^{6}\mathrm{Li}$ reaction is a destruction process for $^{9}\text{Be}$ in stars and the Big Bang. The Trojan Horse Method (THM) is a well-established indirect technique that enables the determination of reaction cross sections within the Gamow energy region while avoiding the uncertainties associated with low-energy extrapolations of the $S(E)$ factor and electron-screening effects. In this work, the bare-nucleus THM data reported by Wen \textit{et al.} are systematically analyzed using polynomial fitting, a double Breit--Wigner model, and the $R$-matrix formalism. The applicability and physical implications of these theoretical approaches in describing the low-energy $S(E)$ factor of the $^{9}\mathrm{Be}(p,α)^{6}\mathrm{Li}$ reaction are investigated and compared. Since the THM data have been incorporated into the NACRE II reaction-rate compilation, leading to improved accuracy in reaction-rate evaluations, the refined theoretical analysis presented here provides further insight into the underlying reaction dynamics and establishes a more reliable foundation for stellar reaction-rate calculations. The results obtained in this work offer valuable reference for future high-precision experimental investigations and the development of theoretical models in nuclear astrophysics.
发表机构
- School of Physics, Anhui University（安徽大学物理学院）
- School of Physics, Southern University of Science and Technology（南方科技大学物理学院）
- College of Physics and Optoelectronic Engineering, Shenzhen University（深圳大学物理与光电工程学院）
- Institute of Radiation Technology, Beijing Academy of Science and Technology（北京市科学技术研究院辐射技术研究所）
- Department of Nuclear Physics, China Institute of Atomic Energy（中国原子能科学研究院核物理系）
机构由 AI 辅助整理，请以论文原文为准。
